app.py

from flask import Flask, render_template, jsonify, send_from_directory
import os
import pandas as pd

app = Flask(__name__)

# Load the vehicle data
vehicle_data_path = os.path.join(os.path.dirname(__file__), 'vehicle_data.csv')

@app.route('/')
def home():
    return render_template('index.html')

@app.route('/api/vehicle_data', methods=['GET'])
def get_vehicle_data():
    print(f"CSV file path: {vehicle_data_path}")  # Debugging line to print the file path once
    if os.path.exists(vehicle_data_path):
        try:
            vehicle_data = pd.read_csv(vehicle_data_path)
            print(vehicle_data)  # Print the data only once after successfully reading the CSV file
            return jsonify(vehicle_data.to_dict(orient='records'))
        except pd.errors.EmptyDataError:
            print("CSV file is empty")
            return jsonify([])  # Return empty JSON array if the file is empty
        except Exception as e:
            print(f"Error reading CSV file: {e}")
            return jsonify([])  # Return empty JSON array on any other error
    else:
        print("vehicle_data.csv file not found")  # Debugging line
        return jsonify([])

@app.route('/simulation_map')
def simulation_map():
    return render_template('map.html')

@app.route('/static/<path:filename>')
def static_files(filename):
    return send_from_directory('static', filename)

if __name__ == "__main__":
    app.run(debug=True)